/* ================================================================
   MAKECALL Voice AI Agents — Layout System
   App shell: collapsible sidebar + topbar + content area.
   ================================================================ */

/* ── App Shell Grid ── */
.app-shell {
  display: grid;
  grid-template-columns: var(--sidebar-width) 1fr;
  grid-template-rows: var(--topbar-height) 1fr;
  grid-template-areas:
    "sidebar topbar"
    "sidebar content";
  min-height: 100vh;
  transition: grid-template-columns var(--duration-normal) var(--ease-default);
}
.app-shell.sidebar-collapsed {
  grid-template-columns: var(--sidebar-collapsed) 1fr;
}

/* ── Sidebar ── */
.sidebar {
  grid-area: sidebar;
  background: var(--color-sidebar-bg);
  color: var(--color-sidebar-text);
  display: flex;
  flex-direction: column;
  overflow: hidden;
  position: fixed;
  top: 0;
  left: 0;
  width: var(--sidebar-width);
  height: 100vh;
  z-index: var(--z-sticky);
  transition: width var(--duration-normal) var(--ease-default);
}
.sidebar-collapsed .sidebar {
  width: var(--sidebar-collapsed);
}

/* ── Sidebar Header ── */
.sidebar-header {
  padding: var(--space-4) var(--space-5);
  display: flex;
  align-items: center;
  gap: var(--space-3);
  height: var(--topbar-height);
  flex-shrink: 0;
  border-bottom: 1px solid var(--color-sidebar-divider);
}
.sidebar-logo {
  width: 28px; height: 28px;
  border-radius: var(--radius-md);
  background: var(--color-brand-400);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: var(--text-md);
  font-weight: var(--font-bold);
  color: #fff;
  flex-shrink: 0;
}
.sidebar-brand {
  font-size: var(--text-md);
  font-weight: var(--font-semibold);
  color: #fff;
  white-space: nowrap;
  overflow: hidden;
}
.sidebar-collapsed .sidebar-brand { display: none; }

/* ── Sidebar Navigation ── */
.sidebar-nav {
  flex: 1;
  padding: var(--space-3) var(--space-2);
  overflow-y: auto;
  overflow-x: hidden;
}
.sidebar-section-label {
  padding: var(--space-4) var(--space-3) var(--space-2);
  font-size: var(--text-xs);
  font-weight: var(--font-semibold);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: rgba(255,255,255,0.35);
  white-space: nowrap;
}
.sidebar-collapsed .sidebar-section-label { display: none; }

.sidebar-item {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  padding: var(--space-2) var(--space-3);
  margin-bottom: 2px;
  border-radius: var(--radius-md);
  color: var(--color-sidebar-text);
  font-size: var(--text-sm);
  font-weight: var(--font-normal);
  cursor: pointer;
  transition: all var(--duration-fast);
  text-decoration: none;
  white-space: nowrap;
  overflow: hidden;
}
.sidebar-item:hover {
  background: var(--color-sidebar-bg-hover);
  color: #fff;
}
.sidebar-item.active {
  background: rgba(124, 58, 237, 0.2);
  color: var(--color-sidebar-text-active);
  font-weight: var(--font-medium);
}
.sidebar-item.active::before {
  content: '';
  position: absolute;
  left: 0;
  width: 3px;
  height: 24px;
  background: var(--color-sidebar-accent);
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
}
.sidebar-item {
  position: relative;
}
.sidebar-item-icon {
  width: 20px;
  text-align: center;
  flex-shrink: 0;
  font-size: var(--text-md);
  opacity: 0.75;
}
.sidebar-item.active .sidebar-item-icon { opacity: 1; }
.sidebar-item-label { overflow: hidden; text-overflow: ellipsis; }
.sidebar-collapsed .sidebar-item-label { display: none; }
.sidebar-item-badge {
  margin-left: auto;
  min-width: 18px;
  height: 18px;
  padding: 0 5px;
  background: var(--color-danger);
  color: #fff;
  border-radius: var(--radius-full);
  font-size: 10px;
  font-weight: var(--font-bold);
  display: flex;
  align-items: center;
  justify-content: center;
}
.sidebar-collapsed .sidebar-item-badge { display: none; }

/* ── Sidebar Footer ── */
.sidebar-footer {
  padding: var(--space-3) var(--space-2);
  border-top: 1px solid var(--color-sidebar-divider);
  flex-shrink: 0;
}
.sidebar-user {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  padding: var(--space-2) var(--space-3);
  border-radius: var(--radius-md);
  cursor: pointer;
  transition: background var(--duration-fast);
}
.sidebar-user:hover { background: var(--color-sidebar-bg-hover); }
.sidebar-user-info {
  overflow: hidden;
  white-space: nowrap;
}
.sidebar-user-name {
  font-size: var(--text-sm);
  font-weight: var(--font-medium);
  color: #fff;
}
.sidebar-user-email {
  font-size: var(--text-xs);
  color: var(--color-sidebar-text);
}
.sidebar-collapsed .sidebar-user-info { display: none; }

/* Sidebar collapse toggle */
.sidebar-toggle {
  display: flex;
  align-items: center;
  justify-content: center;
  padding: var(--space-2);
  margin-bottom: var(--space-1);
  border-radius: var(--radius-md);
  cursor: pointer;
  color: var(--color-sidebar-text);
  transition: all var(--duration-fast);
}
.sidebar-toggle:hover { background: var(--color-sidebar-bg-hover); color: #fff; }

/* Theme toggle row */
.sidebar-theme {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  padding: var(--space-2) var(--space-3);
  margin-bottom: var(--space-1);
  border-radius: var(--radius-md);
  cursor: pointer;
  font-size: var(--text-sm);
  color: var(--color-sidebar-text);
  transition: all var(--duration-fast);
}
.sidebar-theme:hover { background: var(--color-sidebar-bg-hover); color: #fff; }

/* ── Topbar ── */
.topbar {
  grid-area: topbar;
  height: var(--topbar-height);
  background: var(--color-bg-0);
  border-bottom: 1px solid var(--color-border);
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 var(--space-6);
  position: sticky;
  top: 0;
  z-index: var(--z-sticky);
}
.topbar-left {
  display: flex;
  align-items: center;
  gap: var(--space-4);
}
.topbar-title {
  font-size: var(--text-md);
  font-weight: var(--font-semibold);
  color: var(--color-text-primary);
}
.topbar-breadcrumb {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  font-size: var(--text-sm);
  color: var(--color-text-secondary);
}
.topbar-breadcrumb-sep { color: var(--color-text-tertiary); }
.topbar-right {
  display: flex;
  align-items: center;
  gap: var(--space-3);
}
.topbar-menu-btn {
  display: none;
  padding: var(--space-2);
  cursor: pointer;
  color: var(--color-text-secondary);
  font-size: var(--text-lg);
}

/* ── Content Area ── */
.page-content {
  grid-area: content;
  padding: var(--space-6);
  overflow-y: auto;
  min-height: calc(100vh - var(--topbar-height));
}
.page-inner {
  max-width: var(--content-max-width);
  margin: 0 auto;
}
.page-header {
  margin-bottom: var(--space-6);
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: var(--space-4);
}
.page-title {
  font-size: var(--text-xl);
  font-weight: var(--font-bold);
  color: var(--color-text-primary);
}
.page-description {
  font-size: var(--text-sm);
  color: var(--color-text-secondary);
  margin-top: var(--space-1);
}

/* ── Grid Helpers ── */
.grid { display: grid; gap: var(--space-4); }
.grid-2 { grid-template-columns: repeat(2, 1fr); }
.grid-3 { grid-template-columns: repeat(3, 1fr); }
.grid-4 { grid-template-columns: repeat(4, 1fr); }
.grid-auto { grid-template-columns: repeat(auto-fit, minmax(260px, 1fr)); }

/* ── Flex Helpers ── */
.flex { display: flex; }
.flex-col { flex-direction: column; }
.items-center { align-items: center; }
.justify-between { justify-content: space-between; }
.gap-2 { gap: var(--space-2); }
.gap-3 { gap: var(--space-3); }
.gap-4 { gap: var(--space-4); }
.gap-6 { gap: var(--space-6); }

/* ── Page Transition ── */
.page-enter {
  animation: page-fade-in var(--duration-normal) var(--ease-out);
}
@keyframes page-fade-in {
  from { opacity: 0; transform: translateY(8px); }
  to   { opacity: 1; transform: translateY(0); }
}

/* ── Mobile Overlay ── */
.sidebar-overlay {
  display: none;
  position: fixed;
  inset: 0;
  background: rgba(0,0,0,0.5);
  z-index: calc(var(--z-sticky) - 1);
}

/* ── Responsive ── */
@media (max-width: 1024px) {
  .app-shell {
    grid-template-columns: 1fr;
    grid-template-areas:
      "topbar"
      "content";
  }
  .sidebar {
    transform: translateX(-100%);
  }
  .app-shell.sidebar-open .sidebar {
    transform: translateX(0);
  }
  .app-shell.sidebar-open .sidebar-overlay {
    display: block;
  }
  .topbar-menu-btn { display: block; }
}

@media (max-width: 768px) {
  .page-content { padding: var(--space-4); }
  .grid-2, .grid-3, .grid-4 { grid-template-columns: 1fr; }
  .page-header { flex-direction: column; align-items: flex-start; }
}